Final answer:
The client is in the unfreezing stage of Lewin's Change Theory when they begin to recognize the necessity for dietary change and show willingness to learn about a low-sodium diet that reduces processed foods, which may lead to better management of their hypertension.
Step-by-step explanation:
A nurse leader, working with a client who needs to learn about a low-sodium diet in the context of hypertension management, would recognize the client is in the unfreezing stage of Lewin's Change Theory if the client starts to acknowledge the need for change. This stage involves increasing the client's awareness of the need for change and creating a motivation for change.
For instance, the nurse leader might introduce information on how a low-sodium diet, which de-emphasizes processed foods and emphasizes whole foods and healthy fats, can help in managing hypertension. The significance of shifting focus away from processed foods is that it automatically reduces sodium intake, since most processed foods are high in salt, leading to better blood pressure control. Through educational efforts and support, the nurse leader engages the client during the unfreezing stage in readiness for the transition to healthier dietary choices.